efa: enable updateStrategy to be overridden through helm values

Author: nikhilym

stable/aws-efa-k8s-device-plugin/README.md

@@ -34,5 +34,5 @@ Parameter | Description | Default
 `nameOverride` | Override the name of the chart | `""`
 `fullnameOverride` | Override the full name of the chart | `""`
 `imagePullSecrets` | Docker registry pull secret | `[]`
-`updateStrategy` | Update strategy for deployment set | `type: RollingUpdate`
+`updateStrategy` | Update strategy for daemon set | `type: RollingUpdate`